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AIRWORTHINESS DIRECTIVE

The following airworthiness directive (AD) may be applicable to an aircraft which our records indicate is registered in your name. ADs are issued pursuant to Canadian 

Aviation Regulation (CAR) 521 Division X. Pursuant to CAR 605.84 and the further details of CAR Standard 625, Appendix H, the continuing airworthiness of a Canadian registered aircraft is contingent upon compliance with all applicable ADs. Failure to comply with the requirements of an AD may invalidate the flight authorization of the aircraft. Alternative means of compliance shall be applied for in accordance with CAR 605.84 and the above-referenced Standard. 

This AD has been issued by the Continuing Airworthiness Division (AARDG), National Aircraft Certification Branch, Transport Canada, Ottawa, telephone (613) 952-4357. 

URGENT URGENT URGENT URGENT URGENT URGENT URGENT URGENT URGENT

TRANSPORT CANADA EMERGENCY AIRWORTHINESS DIRECTIVE 

PLEASE FORWARD IMMEDIATELY TO THE PERSON RESPONSIBLE FOR THE OPERATION 

AND MAINTENANCE OF YOUR AIRCRAFT

Pursuant to CAR 202.51 the registered owner of a Canadian aircraft shall, within seven days, notify the Minister in writing of any change 

of his or her name or address. To request a change of address, contact the Civil Aviation Communications Centre (AARA) at Place 

de Ville, Ottawa, Ontario K1A 0N8, or 1-800-305-2059. 

24-0022 (01-2001) This document is available on the web at : http://www.tc.gc.ca/aviation/ad/ad_e.htm

1/2 No.

CF-2010-36

Issue Date 

18 October 2010 

Number: CF- 2010-36 

Subject: Main Landing Gear Door – Fairing Seal Interference

Effective: Upon receipt 

Applicability: Bombardier Inc. Models: 

CL-600-2C10, serial numbers 10003 and subsequent 

CL-600-2D15 and CL-600-2D24, serial number 15001 and subsequent

Compliance: As indicated below 

Background: Two cases of main landing gear (MLG) failure to fully extend have been reported. An 

MLG failing to extend may result in an unsafe asymmetric landing configuration. 

Preliminary investigation has shown that interference between the MLG door and the 

MLG fairing seal prevented the MLG door from opening. 

This directive mandates the inspection and rectification, as required, of the MLG fairing 

and seal, MLG door, and adjacent structures. 

Corrective 

Actions: 

A. Initially, use the following schedule: 

1. For aeroplane serial numbers 10003 to 10313; 15001 to 15238; and 15240 to 

15255, within 50 flight cycles from the effective date of this directive. 

2. For all other aeroplane serial numbers, within 600 hours air time from the 

effective date of this directive. 

B. Perform a detailed inspection of the MLG fairing and seal, MLG door and adjacent 

structures in accordance with Part A of the Accomplishment Instructions of 

Bombardier Alert Service Bulletin (ASB) A670BA-32-030, dated 18 October 2010, or 

later revisions approved by the Chief, Continuing Airworthiness, Transport Canada. 

1. If no damage is found, proceed to paragraph C of this directive. 
No.

 N° CF-2010-36 2/2 

2. If damage to the MLG fairing seal is found, complete either Part B or Part C of 

the Accomplishment Instructions of the above ASB. 

3. If Part C of the Accomplishment Instructions of the above ASB is used for 

compliance with paragraph B.2. of this directive, Part D of the Accomplishment 

Instructions of the above ASB must be completed if the MLG door is to be 

reinstalled. 

4. For all other damage or missing parts/fasteners found, contact Bombardier 

Regional Aircraft Customer Response Center for disposition prior to further flight.

C. Subsequently, at intervals not to exceed 600 hours air time from previous inspection, 

repeat the inspection and rectification detailed in Paragraph B above. 

D. Within 30 days after Part B of the Above ASB was completed, forward the completed 

Data Sheet found in Appendix A of the above ASB to Bombardier Aerospace via the 

Bombardier Regional Aircraft Customer Response Center. 

Authorization: For Minister of Transport, Infrastructure and Communities 

ORIGINAL SIGNED BY

Derek Ferguson 

Chief, Continuing Airworthiness 

Contact: Miss Helen Tsai, Continuing Airworthiness, Ottawa, telephone 613-952-4357, facsimile 

613-996-9178 or e-mail CAWWEBFeedback@tc.gc.ca or any Transport Canada Centre.